/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 01:58:21,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 01:58:21,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 01:58:21,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 01:58:21,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 01:58:21,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 01:58:21,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 01:58:21,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 01:58:21,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 01:58:21,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 01:58:21,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 01:58:21,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 01:58:21,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 01:58:21,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 01:58:21,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 01:58:21,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 01:58:21,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 01:58:21,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 01:58:21,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 01:58:21,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 01:58:21,549 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 01:58:21,577 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 01:58:21,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 01:58:21,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 01:58:21,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 01:58:21,579 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 01:58:21,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 01:58:21,579 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 01:58:21,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 01:58:21,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 01:58:21,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 01:58:21,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 01:58:21,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 01:58:21,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 01:58:21,581 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 01:58:21,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 01:58:21,581 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 01:58:21,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 01:58:21,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 01:58:21,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 01:58:21,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 01:58:21,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 01:58:21,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 01:58:21,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 01:58:21,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 01:58:21,582 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 01:58:21,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 01:58:21,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 01:58:21,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 01:58:21,582 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 01:58:21,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 01:58:21,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 01:58:21,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 01:58:21,848 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 01:58:21,849 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 01:58:21,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i [2021-05-06 01:58:21,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd93e6a29/923937b2ad6e498283e22504a9c5a42e/FLAGa4d244bed [2021-05-06 01:58:22,256 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 01:58:22,256 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i [2021-05-06 01:58:22,261 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd93e6a29/923937b2ad6e498283e22504a9c5a42e/FLAGa4d244bed [2021-05-06 01:58:22,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd93e6a29/923937b2ad6e498283e22504a9c5a42e [2021-05-06 01:58:22,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 01:58:22,687 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 01:58:22,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 01:58:22,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 01:58:22,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 01:58:22,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:58:22" (1/1) ... [2021-05-06 01:58:22,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f37bef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:58:22, skipping insertion in model container [2021-05-06 01:58:22,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:58:22" (1/1) ... [2021-05-06 01:58:22,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 01:58:22,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 01:58:22,796 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i[959,972] [2021-05-06 01:58:22,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:58:22,808 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 01:58:22,816 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound10.i[959,972] [2021-05-06 01:58:22,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:58:22,857 INFO L208 MainTranslator]: Completed translation [2021-05-06 01:58:22,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:58:22 WrapperNode [2021-05-06 01:58:22,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 01:58:22,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 01:58:22,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 01:58:22,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 01:58:22,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:58:22" (1/1) ... [2021-05-06 01:58:22,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:58:22" (1/1) ... [2021-05-06 01:58:22,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:58:22" (1/1) ... [2021-05-06 01:58:22,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:58:22" (1/1) ... [2021-05-06 01:58:22,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:58:22" (1/1) ... [2021-05-06 01:58:22,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:58:22" (1/1) ... [2021-05-06 01:58:22,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:58:22" (1/1) ... [2021-05-06 01:58:22,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 01:58:22,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 01:58:22,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 01:58:22,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 01:58:22,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:58:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 01:58:22,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 01:58:22,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 01:58:22,925 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 01:58:22,925 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 01:58:22,925 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 01:58:22,925 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 01:58:22,925 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 01:58:22,926 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 01:58:22,926 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 01:58:22,926 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 01:58:22,926 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 01:58:22,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 01:58:22,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 01:58:22,926 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 01:58:22,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 01:58:22,926 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 01:58:22,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 01:58:22,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 01:58:22,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 01:58:22,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 01:58:22,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 01:58:22,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 01:58:23,088 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 01:58:23,088 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 01:58:23,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:58:23 BoogieIcfgContainer [2021-05-06 01:58:23,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 01:58:23,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 01:58:23,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 01:58:23,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 01:58:23,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 01:58:22" (1/3) ... [2021-05-06 01:58:23,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e73b4cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:58:23, skipping insertion in model container [2021-05-06 01:58:23,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:58:22" (2/3) ... [2021-05-06 01:58:23,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e73b4cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:58:23, skipping insertion in model container [2021-05-06 01:58:23,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:58:23" (3/3) ... [2021-05-06 01:58:23,094 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound10.i [2021-05-06 01:58:23,097 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 01:58:23,100 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 01:58:23,110 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 01:58:23,124 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 01:58:23,124 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 01:58:23,124 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 01:58:23,124 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 01:58:23,124 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 01:58:23,124 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 01:58:23,124 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 01:58:23,124 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 01:58:23,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 01:58:23,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 01:58:23,137 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:58:23,137 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:58:23,137 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:58:23,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:58:23,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2126508982, now seen corresponding path program 1 times [2021-05-06 01:58:23,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:58:23,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109660421] [2021-05-06 01:58:23,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:58:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:58:23,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 01:58:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:58:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:58:23,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:58:23,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109660421] [2021-05-06 01:58:23,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109660421] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:58:23,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:58:23,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 01:58:23,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642545430] [2021-05-06 01:58:23,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 01:58:23,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:58:23,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 01:58:23,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:58:23,288 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:58:23,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:58:23,344 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-05-06 01:58:23,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 01:58:23,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 01:58:23,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:58:23,350 INFO L225 Difference]: With dead ends: 44 [2021-05-06 01:58:23,350 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 01:58:23,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:58:23,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 01:58:23,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-06 01:58:23,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:58:23,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-05-06 01:58:23,375 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-05-06 01:58:23,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:58:23,376 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-05-06 01:58:23,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:58:23,376 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-05-06 01:58:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 01:58:23,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:58:23,377 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:58:23,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 01:58:23,377 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:58:23,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:58:23,378 INFO L82 PathProgramCache]: Analyzing trace with hash 941422680, now seen corresponding path program 1 times [2021-05-06 01:58:23,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:58:23,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239041658] [2021-05-06 01:58:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:58:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:58:23,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 01:58:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:58:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:58:23,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:58:23,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239041658] [2021-05-06 01:58:23,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239041658] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:58:23,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:58:23,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 01:58:23,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629204685] [2021-05-06 01:58:23,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 01:58:23,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:58:23,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 01:58:23,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:58:23,454 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:58:23,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:58:23,514 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-06 01:58:23,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 01:58:23,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 01:58:23,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:58:23,515 INFO L225 Difference]: With dead ends: 35 [2021-05-06 01:58:23,515 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 01:58:23,516 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:58:23,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 01:58:23,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 01:58:23,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:58:23,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-05-06 01:58:23,521 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2021-05-06 01:58:23,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:58:23,521 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-05-06 01:58:23,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:58:23,521 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-05-06 01:58:23,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 01:58:23,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:58:23,522 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:58:23,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 01:58:23,522 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:58:23,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:58:23,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1209133518, now seen corresponding path program 1 times [2021-05-06 01:58:23,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:58:23,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276895562] [2021-05-06 01:58:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:58:23,534 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:58:23,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476171441] [2021-05-06 01:58:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:58:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:58:23,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 01:58:23,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:58:23,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:23,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:23,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:23,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:23,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:23,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:23,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:23,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:58:23,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:58:23,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276895562] [2021-05-06 01:58:23,713 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:58:23,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476171441] [2021-05-06 01:58:23,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476171441] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:58:23,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:58:23,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 01:58:23,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282128312] [2021-05-06 01:58:23,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 01:58:23,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:58:23,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 01:58:23,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:58:23,718 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:58:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:58:23,744 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-06 01:58:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 01:58:23,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-06 01:58:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:58:23,747 INFO L225 Difference]: With dead ends: 34 [2021-05-06 01:58:23,747 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 01:58:23,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:58:23,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 01:58:23,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-06 01:58:23,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:58:23,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-05-06 01:58:23,757 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2021-05-06 01:58:23,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:58:23,757 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-05-06 01:58:23,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:58:23,758 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-05-06 01:58:23,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 01:58:23,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:58:23,759 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:58:23,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 01:58:23,983 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:58:23,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:58:23,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1207346058, now seen corresponding path program 1 times [2021-05-06 01:58:23,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:58:23,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318770810] [2021-05-06 01:58:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:58:23,995 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:58:23,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078371045] [2021-05-06 01:58:23,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:58:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:58:24,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 01:58:24,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:58:24,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:58:24,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:58:24,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318770810] [2021-05-06 01:58:24,237 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:58:24,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078371045] [2021-05-06 01:58:24,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078371045] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:58:24,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:58:24,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 01:58:24,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032167645] [2021-05-06 01:58:24,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 01:58:24,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:58:24,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 01:58:24,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:58:24,240 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:58:24,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:58:24,297 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-05-06 01:58:24,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 01:58:24,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-06 01:58:24,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:58:24,299 INFO L225 Difference]: With dead ends: 35 [2021-05-06 01:58:24,300 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 01:58:24,300 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:58:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 01:58:24,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 01:58:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 01:58:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-05-06 01:58:24,313 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2021-05-06 01:58:24,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:58:24,313 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-05-06 01:58:24,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:58:24,314 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-05-06 01:58:24,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 01:58:24,314 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:58:24,315 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:58:24,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:58:24,532 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:58:24,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:58:24,533 INFO L82 PathProgramCache]: Analyzing trace with hash -352921097, now seen corresponding path program 1 times [2021-05-06 01:58:24,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:58:24,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073440960] [2021-05-06 01:58:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:58:24,541 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:58:24,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808543655] [2021-05-06 01:58:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:58:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:58:24,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 01:58:24,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:58:24,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:58:24,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:58:24,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073440960] [2021-05-06 01:58:24,645 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:58:24,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808543655] [2021-05-06 01:58:24,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808543655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:58:24,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:58:24,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 01:58:24,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278507233] [2021-05-06 01:58:24,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 01:58:24,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:58:24,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 01:58:24,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:58:24,647 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:58:24,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:58:24,663 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2021-05-06 01:58:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 01:58:24,664 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-06 01:58:24,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:58:24,664 INFO L225 Difference]: With dead ends: 46 [2021-05-06 01:58:24,664 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 01:58:24,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:58:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 01:58:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 01:58:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 01:58:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-06 01:58:24,668 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 17 [2021-05-06 01:58:24,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:58:24,668 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-06 01:58:24,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:58:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-06 01:58:24,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 01:58:24,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:58:24,668 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:58:24,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:58:24,886 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:58:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:58:24,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1615882355, now seen corresponding path program 1 times [2021-05-06 01:58:24,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:58:24,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069066514] [2021-05-06 01:58:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:58:24,894 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:58:24,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008609737] [2021-05-06 01:58:24,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:58:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:58:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 01:58:24,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:58:24,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:58:24,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:58:24,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069066514] [2021-05-06 01:58:24,986 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:58:24,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008609737] [2021-05-06 01:58:24,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008609737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:58:24,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:58:24,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 01:58:24,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623833460] [2021-05-06 01:58:24,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 01:58:24,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:58:24,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 01:58:24,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:58:24,988 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:58:25,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:58:25,015 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-05-06 01:58:25,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 01:58:25,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 01:58:25,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:58:25,016 INFO L225 Difference]: With dead ends: 46 [2021-05-06 01:58:25,016 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 01:58:25,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:58:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 01:58:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-06 01:58:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 30 states have internal predecessors, (38), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 01:58:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-05-06 01:58:25,020 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 18 [2021-05-06 01:58:25,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:58:25,020 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-05-06 01:58:25,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:58:25,020 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-05-06 01:58:25,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 01:58:25,020 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:58:25,021 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:58:25,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:58:25,238 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:58:25,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:58:25,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1617669815, now seen corresponding path program 1 times [2021-05-06 01:58:25,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:58:25,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433090244] [2021-05-06 01:58:25,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:58:25,246 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:58:25,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985527434] [2021-05-06 01:58:25,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:58:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:58:25,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 01:58:25,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:58:25,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:25,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:25,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:58:25,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:58:25,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433090244] [2021-05-06 01:58:25,378 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:58:25,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985527434] [2021-05-06 01:58:25,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985527434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:58:25,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:58:25,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 01:58:25,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808722014] [2021-05-06 01:58:25,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 01:58:25,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:58:25,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 01:58:25,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:58:25,380 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:58:25,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:58:25,450 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-05-06 01:58:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 01:58:25,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 01:58:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:58:25,451 INFO L225 Difference]: With dead ends: 52 [2021-05-06 01:58:25,451 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 01:58:25,451 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:58:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 01:58:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-05-06 01:58:25,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 01:58:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-05-06 01:58:25,455 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 18 [2021-05-06 01:58:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:58:25,455 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-05-06 01:58:25,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 01:58:25,455 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-05-06 01:58:25,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 01:58:25,456 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:58:25,456 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:58:25,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 01:58:25,673 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:58:25,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:58:25,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1627795671, now seen corresponding path program 1 times [2021-05-06 01:58:25,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:58:25,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594651129] [2021-05-06 01:58:25,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:58:25,679 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:58:25,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171816864] [2021-05-06 01:58:25,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:58:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:58:25,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 01:58:25,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:58:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:58:25,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:58:25,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594651129] [2021-05-06 01:58:25,763 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:58:25,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171816864] [2021-05-06 01:58:25,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171816864] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:58:25,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:58:25,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 01:58:25,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584005145] [2021-05-06 01:58:25,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 01:58:25,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:58:25,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 01:58:25,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:58:25,764 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:58:25,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:58:25,775 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2021-05-06 01:58:25,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 01:58:25,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-05-06 01:58:25,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:58:25,776 INFO L225 Difference]: With dead ends: 58 [2021-05-06 01:58:25,776 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 01:58:25,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:58:25,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 01:58:25,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 01:58:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 01:58:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-05-06 01:58:25,779 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2021-05-06 01:58:25,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:58:25,779 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-05-06 01:58:25,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:58:25,779 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-05-06 01:58:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 01:58:25,780 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:58:25,780 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:58:25,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:58:25,997 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:58:25,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:58:25,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1817538190, now seen corresponding path program 1 times [2021-05-06 01:58:25,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:58:25,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652661827] [2021-05-06 01:58:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:58:26,020 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:58:26,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907362908] [2021-05-06 01:58:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:58:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:58:26,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 01:58:26,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:58:26,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:26,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:26,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:26,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:26,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:26,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:26,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:26,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:26,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:26,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:26,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:26,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:26,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:26,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:58:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:58:26,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:58:26,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652661827] [2021-05-06 01:58:26,128 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:58:26,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907362908] [2021-05-06 01:58:26,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907362908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:58:26,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:58:26,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 01:58:26,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533139637] [2021-05-06 01:58:26,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 01:58:26,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:58:26,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 01:58:26,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:58:26,129 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:58:26,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:58:26,153 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2021-05-06 01:58:26,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:58:26,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-05-06 01:58:26,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:58:26,154 INFO L225 Difference]: With dead ends: 60 [2021-05-06 01:58:26,154 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 01:58:26,154 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:58:26,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 01:58:26,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-05-06 01:58:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 01:58:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-05-06 01:58:26,158 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 27 [2021-05-06 01:58:26,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:58:26,158 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-05-06 01:58:26,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:58:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-05-06 01:58:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 01:58:26,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:58:26,159 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:58:26,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:58:26,384 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:58:26,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:58:26,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1815750730, now seen corresponding path program 1 times [2021-05-06 01:58:26,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:58:26,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043467377] [2021-05-06 01:58:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:58:26,400 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:58:26,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360216431] [2021-05-06 01:58:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true